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According to "EPA Fate, Transport and Transformation Test Guidelines, OPPTS 835.3170—Shake Flask Die-Away Test" and "OECD Test Guidelines of Chemical 309", a simulated biodegradation experiment was conducted with the organic pollutant parathion-methyl. First-order biodegradation rate constants for water and sediment were -0.053 and -0.295 d-1, respectively, and half-lives were 13.1 and 2.3 d, respectively.

试验结果表明，甲基对硫磷在天然地表水中生物降解一级速率常数为：-0.053 d-1；在天然地表水沉积物中生物降解一级速率常数为：-0.295d-1；在地表水中生物降解半衰期为：13.1d；在地表水沉积物中生物降解半衰期为：2.3d。

Dissolve 50.0g of polyethylene glycol in 75ml of diphenyl ether, previously warmed, if necessary, just to melt the crystals, in a 250ml distilling flask.

你的理解好像是必要时加入聚乙二醇和二苯醚后一起加热，而我的理解是必要时加入聚乙醇后用预先加热的二苯醚溶解。

Commercial dicyclopentadiene*15 mL of have been added to the 25 mL distilling flask.

将15ml工业用二环茂二烯*加入25ml蒸馏瓶中。

Successive steps include adding a concentrated heat reversible gel solution (5) to the flask to cover the critical pattern surfaces (13), and cooling the gel solution to form an elastic solid gel mold (7). The gel mold (7) has critical gel mold surfaces inverse to the critical pattern surfaces.

接下来的步骤包括向烧瓶中加入一个高浓度热可逆凝胶溶液（5）覆盖型面（13），和将凝胶溶液冷却形成一个弹性的固体凝胶铸型（7），凝胶铸型（7）具有与模样型面相反的凝胶铸型型面。

He was recrystallizing aspartame from ethanol when the mixture spilled on to the outside of the flask he was using.

他是从recrystallizing甜味剂乙醇的混合物时，泄漏到外部的烧瓶他使用。

Enzyme activity in supernatant from flask fermentation after 132 boors induction was 167 umL^(-1) Its expression products was active under pH2.0~8.0 and the activity was up to the the highest under pH5.5. The optimum temperature for enzyme activity was 55℃.

摇瓶诱导发酵132h后发酵液中植酸酶的活性可达167umL^(-1)；表达产物在pH2.0~8.0均有活性，最适pH为5.5，最适温度为55℃。

All Mut+and Muts colones were induced respectively with methanol to secrete interesting peptide in shake-flask cultures for four days. After dialysis and lyophilization, the supernate of cultures were identified by SDS-PAGE and Western blotting to find the genetically engineered Pichia pastoris which expressed interesting peptide.

在摇瓶中分别用甲醇诱导Mut~+和Mut~s型转化子表达蛋白4d，取培养产物冻干浓缩，进行SDS-PAGE和Western blotting，分析蛋白的含量及纯度，筛选出能特异表达目的蛋白的基因工程菌。

Collect the eluant containing the orange component in a weighed flask.

用己秤量的烧瓶，收集含有橙色组份的洗脱剂。

Catch the filtrate in a clean dry filter flask.

用一个微型刮勺把附在烧杯的晶体刮下。

Were studied. Phytoncidere was collected by filter flask and air sampler, and analyzed by GC-MS with peak area normalization method.

用抽滤瓶和大气采样器采集薰衣草精气，通过气相色谱－质谱对其进行分析鉴定，峰面积归一法测定各成分GC含量。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。